For a molecule to absorb IR, why must the molecule's vibrations cause fluctuations in the dipole moment of the molecule?

Question

TuteeHUB · Accepted Answer

Because fluctuations in the dipole moment allow the molecule to deform by bending and stretching

TuteeHUB · Answer

Because a change in dipole moment lowers the energy required for electronic transitions

TuteeHUB · Answer

Because for absorption to occur, the radiation must interact with the electric field caused by changing dipole moment

TuteeHUB · Answer

All of the above

1.	For a molecule to absorb IR, why must the molecule's vibrations cause fluctuations in the dipole moment of the molecule?
A.	Because a change in dipole moment lowers the energy required for electronic transitions
B.	Because for absorption to occur, the radiation must interact with the electric field caused by changing dipole moment
C.	Because fluctuations in the dipole moment allow the molecule to deform by bending and stretching
D.	All of the above
Answer» C. Because fluctuations in the dipole moment allow the molecule to deform by bending and stretching

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